I need to test the output of all speakers in a 5.1 system that runs 10.04 and 12.04 Ubuntu?
How do I do that?
Personally I use the command line:
List your sound card(s)
aplay -L
Test your speakers:
speaker-test -Dplug:surround51 -c6 -l1 -twav
You may also specify a speaker
speaker-test -s left-front -twav
See also
Ubuntu Community Wiki Surround Sound
Manpage speaker-test
You can also test your speakers from the mixer (mixer varies with window manager)
In 12.04 use the "Test Sound" button